OMAPL138如何在Linux下使用EDMA3驱动

yyj

% c3 a; _7 t6 G0 N4 ]5 S; E& W

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   7 J* c. C7 K; r; D: G
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ! _# b/ V9 T4 _7 t  L# o$ C9 R
8. *
   ! N1 o2 ?+ _. J) ~' K5 c# I( W: r0 u
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 u8 ]7 ~. s4 n' }1 i9 P
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    0 L) [6 |5 J6 s2 l- E# W% Y6 q' J# o8 K3 M
12. *
    , j% r& `1 O- |2 C6 m/ W7 L
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - r. I" z" v( i
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ; F1 u  Y; `! A3 [
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & L# M$ {7 z6 D- ^
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    1 Z- z% L3 e1 B# ^
23. */
    ! V8 J- \9 ]- p! ]5 C1 i- `) y
24. 
    # D3 s, g$ _/ R9 D7 a" m5 S
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 @3 n( V2 M% V9 u
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 m5 j7 [( B" d( L  T
29. #include <linux/interrupt.h>
    , l8 b& R2 f7 v( o; M% X
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    * ^6 V1 `5 u6 p" n& ~
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    & \( u' J+ k1 x# D- i8 P8 ]
35. 
    
36. #include <mach/memory.h>
    - o4 e% M1 |* |8 k8 ~
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    8 I) m- w* O4 W$ L# {
40. 
    1 b: W6 `9 E5 R. B
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    0 @; n; i: U7 \$ w8 ^
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    6 D: w' A+ r) P' O, E
48. #else
    
49. #define DMA_PRINTK( x... )
    . m* A' B% O/ B, }( y# g
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    * J7 t) r$ d4 O' ]) V2 H7 j
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / q" y4 @# ~9 a/ K  W  x
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    1 u- h( {% m# B  m" d- x
57. #define ITCINTEN_SHIFT              21
      F8 M$ `3 [! |' H$ ], P2 T! G
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ) {# ?4 ], I: d7 {9 W3 n# @
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    1 T8 N# N( E$ k5 J
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; i0 c! ~* P' w; J7 \0 U( C
67. 
    # j. D4 \5 X) W+ `: T  x
68. dma_addr_t dmaphyssrc1 = 0;
    5 H7 g1 F4 y; c; v
69. dma_addr_t dmaphyssrc2 = 0;
    . Y! O: z2 v4 z6 D8 S
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    % ~; k' }6 b" ]
72. 
    , i/ t$ g) k- ^3 e% F, q5 D
73. char *dmabufsrc1 = NULL;
    ( g3 B. d, \( r: \* `
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ! R9 m& j, N& \
78. static int acnt = 512;
    2 G$ n3 e1 V3 O
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ' ~( ]- d) e7 C( f) t( E7 ?
81. 
    8 U8 M; {5 O' I  e
82. module_param(acnt, int, S_IRUGO);
    3 D4 H4 v  ]! l) ?7 c- b6 Q$ V* J  v8 k
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

( }5 r) s" P  X& l. W
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
) o& i& L! B6 Z& ~+ k5 Uarm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
/ m* N9 K- q; x. v' q! j